Car dump



G. N. AND A. M. SIMPSON.

CAR DUMP.

' APPUCTION FILED SEPT. 5f |919. 1,412,030, Patented Apr. 4, 1922.

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G. N. AND A. M. SIMPSON.

y cAR DUMP. APPucATloN man SEPT. 5. 1919.'

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GEORGE N. SIMPSON AND ARTHUR-M'. SIMPSON, or CHICAGO, ILLINOIS.

CAB DUMP.

Specification of Letters Patent. Patnted Apr.v 4:, 1922. i

. Application led September 5, 1919. Serial No.`321,971.

To alt 'whom t may concern Be it known that we, GEoRGn N. SIMPSON and ARTHUR M. SIMPSON, citizens ofv the United States, residing at Chicago, in thev county of Cook and State of Illinois, have invented new and useful Improvements in Car Dumps, of which the `following is a specification.

This invention relates to ari-improved apparatus for dumping cars and as shown in this specification is especially adapted for use in dumping one or more mine cars. As we have shown the device hereit is adapted for dumping one car at a time. Our improved device is in the nature of a rotary dump. That is, the loadedcar is dumped by rotating it. It also falls in the general class of dumps known asrrgravity dumps, since the force of gravity is utilized for causing the necessary rotation of the loaded car. w

Heretofore there have been in use many kinds of rotating gravity dumps. The general construction heretofore used consists of a cylindrical cage pivoted on a longitudinal axis. The apparatus is so designed, that when the loaded car is in the cage ready to be dumped, the center of gravity is abovey the axis of rotation. This location of the center of gravity causes a rotation of the cage when the fastening devices are released, and a consequent spilling ofthe load from the car.V VIn devices of this kind counterweights are used for restoring the cage to its upright position after the car is empty. Devicesof this kind :are objectionable for the following reasons. .If the center of gravity of the device, with -a loaded car in the cage, is not somev distance above the'axis of rotation, sufficient rotation of the cage is not procured to produce a complete v'emptying of the car, and power orsome other means must he resorted to to continue the rotation toa suflicient extent t-o cause a coml cent-er of gravity will necessarily be considerably below theaxis of rotation, making. it difficult toagain restore the cage to its upright position. As has been'stated, counterweights are used to restore the cagewith itsV empty carto an upright position, but this is not a simple matter, since-the weight re-l l quired to restore the cage tosuch position is not constant. In the case just mentioned, where the center of gravity of the apparatus4 is considerably below the axis of 'rotation after the car has been emptied, a heavy counterweight is required to commencethe rotation of the lcage back toward its upright position. As the cageA approaches its. upright position, however, with thercenter of gravity'again approaching apoint above the axis of Frotation, the weight of .the counterweight required toV continue such rotation is considerably less. It,V is obvious, therefore, that unless means are devised for checking the backward rotation. ofthe cage or for decreasing the weight ofthe -counterweight, the cage will reach its upright position with great velocity and momentum making the stopping of ita difiicult problem. It will be noted,ltherefore, that ingeneral, the objection to those dumps which operate by rotation 'on a'stationary axis lies in the fact that during the operation of `thedevice the relative position between the center of gravity of the device and the axis of Vrotation varies. For this reason, therefore, it is impossible to return the cage toits upright positionby use of a constant. force. K p Y. l/Ve havedesignedk a rotatingv dump operated through the force of gravity which Vis not subject to the objections noted above.

In our improved dump, we do' not use asta- Y tionary axis upon which to lturn-the l-cage which holds thev car'but use a cylindrical cage which' is designed to roll down an incline thus' causing sufficient rotation to empty the car contained therein. In such a device, it will be noted vthat the axis ofrotation' is at the' yline of contact between the cylindrical cage and inclined surface' and*4 that as the device operates this axisaof rotaltion shifts. VOur device is yso-designed that the cage with. an empty car has its centery 105 Y i from the position it occupies just after the car has been emptied until it is returned to itsnormal upright position. To effect this movement, therefore, a constant force is required and a counterweight of constant weight can be readily utilized.

A' device embodying the features of our invention is shown in the accompanying drawings in which: Fig. 1 is a transverse vertical sectional view ofea dump adapted for usev with mine cars. Fig. 2 is a longitudinal sectional view of the same device.

As shown in said drawings, indicates a cylindrical cage formed of the two rings 2, joined by the bars 4, 4. Bequisite plates for bracing the corners are indicated by '6, l6. vWithin the cage A are mounted two f rails 8, S which form a continuation of the rails 101, 101 leading on an incline from the mine. The rail sections 8, 8 are supported within the cage A by the cross-bars 101, 101 which are supported at their ends on the rings 2, 2 and additionally supported at the center as indicated by the braces 12, 12. lVithin the cage A are arranged the angle irons 14, 14 adapted to lie above the wheels 16, 16 of a mine car B when the same is in the cage to hold it on the rails as the cage A rotates. The angle irons 14, 14 are suitably.

fastened in any manner in the cage, and as here shown they are supported by the uprights 20, 20 the ends of which are fastened to the rings 2. 2 in any convenient manner.

Each of the rings 2, 2 of the cage A is formed of two angle irons with two of their surfaces fastened together so that they will form a ring with a cylindrical surface having a radially projecting flange at the center. The two rings 2, 2 are adapted to rest on the two inclined timbers 22, 22 on the upper surface of eachk of which is mounted a lflat steel rail 23. The radial flanges on the rings 2, 2 lie inside the inner edges of the rails 23,23, so that the cage in rolling'on the rails is prevented from moving to either side.

Below the timbers 22, 22 is a bin C adapt-v ed to receive the contents of a car B after it has been dumped.

rlhe apparatus is so designed that a loaded mine car B may be placed in the cage A, and the cage then allowed to roll down they inclined timbers 22, 22 until it is in the position shown by the dotted lines in Fig. 1,. During this movement the car B is overturned` spilling the contents into the bin C. It will -be noted that dumping the car B in thisA manner will spread its contents over l more surface inthe bin C than if the cage rotated on av stationary axis. This is another of the features of our invention since in Y manyV cases vit is advantageous to so spread the Ucontents of the car.

We have provided the following means for controlling the operation of the cage A. Fastened to each ring 2 at 4() inside of the radial flange is a cable 41 leading from the f ring over a pulley 43 mounted above. and to one side of the cage, and thence leading downwardly with its end attached to a counterweight 44 adapted to slide in the guides A spring connection is provided between the cable 41 and the counterweight 44, the cable 41 extending through a hole in the counterweight to a point below it and there being' fastened to a block 47 which has mounted above it and under the counterweight the spiral spring 48. The cable 41 extends from the pulley 43" through a hole provided in the operatingplatform 50. Thel pulleys 43, 43 are mounted on a shaft 51 suit-` ably journaled which has also' mounted on it the brake drum 52.l Operating on the brake drum 52 is la brake band 53 controlled by the lever 54 which adaptedto be operated by the vert-ical rod 55 controlled by the operating handle 56 conveniently located with re? gard to the operating platform 50.

In the operation of our improved device, a loaded mine carB is placedinthe cage as shown by the solid lines in Fig.' 1. "The weight of the counterweight 44 is sufficient' to roll the combined weight of the cage A and an empty car B up the incline but is'not sufficient to so lift the combined weightof the cage A and a loaded car B. Rotation of' the cage A with a loaded car B is prevented by the band brake 53 on the brake drum 52.. lvhen it is desired to permit the cage A todump, the band brake' is released. The weight of the cage A andthe loaded car B4 then causes the cage to roll down the in-` clined rails until it is in the position indicated by the dotted lines in Fig. 1; It is' obvious that this movement will rotate the car B sufficiently to dump its contents in the bin C. This movement of the cage A can be regulated or checked as desired by the use of the brake band on thebrake drum-'52.' Ars this movement tal-:es place the cables 41, 41 will windiip onV the rings 2, 2 and the counter-weights 44, 44 will be raised. After the car B is dumped the counterweights 44, 44 will tend to restore the'cage A to its-normal position since they are suflicient to roll the cage and an empty car up the in'cline. The cour-iterweights, therefore, will cause the cagee'li to roll back up the inclined rails until it assumes its upright position as indicated by the solid lines in Fig.- 1. This; movement likewise can be controlled as de? sired by the use of the band brake. i

The apparatus is so designed that the cen# ter ofrmass of the cage A with a'n empty car B' placed in it lies substantially in the axis ofthe cylindrical cage, that is,-.on a line` joining the` center points of thetwo rings 2,` 2. `T his may be accomplished by a suitable arrangement of the parts and by suitably adjusting the weights ofthe different parts, or counterwei'ghts attached to the rings 2,24

Vgravity andthe axis of rotationof the cage will remain the same. The 'centerof gravity ofztlie apparatus, as has beenstated, will lie in the axis of the cylindrical cage, and the axis t, of rotation will be the line of contact between the 'rings 2, 2 and the inclined rails 23, 23.` Itisobvious that the relation between these two lines will be the same in all positions of the cage A. IVith such a construction, therefore, counterweights 44, 44 just heavy enough to commence the return movement of the cage are required' and since the center of gravity does not change with respect to ,the axis of rotation, such weights are suflicient to continue this rotation until the upright position has been reached.

It will be noted also that in our improved device any load in the car B is considerably above the axis of rotation of the cage A, since this axis of rotation is identical with the line of contact between the rings 2, 2 and the inclined rails 23, 23. For this rea; son a slight load in the car B will be suicient to cause the downward rolling on the rails. It is obvious, that for the same reason, as long as any load remains in the car B the downward rolling will continue.

Y In other words, the dumping movement will always continue until the car has been completely emptied. This is due to the fact that any load in the car B is always considerably above the axis. of rotation. This is one of the features of our inventionand is a distinct improvement on the devices heretofore used. y

Summing up it might be stated that the broad features of our invention are the provision of a rotating dump in which the axis of rotation shifts, so that the load in the car to be dumped is always considerably above this axis during the entire dumping operation, and in which the center of mass of the cage with an empty car (the center of gravity) always has a position having the same relation to the axis of rotation through the entire movement of the cagefrom the position it occupies after it has been dumped until it is restored to its normal upright. position.

Projecting from the rings 2, 2. we have provided the stops 70, adapted to engage with the timber 7l to limit the'downward.v

ing from the spirit of this invention, such surface may be made with any degree of inclination or may even be level. In this connection it is to be noted that if the supporting surface is level, andthe center of gravity isv exactly above the line of contact between the cagev and such supporting surface when a loaded car-is in the cage, in its'normal upright position,` some means other thany gravity must be resorted tov tofcommence rotation of the cage until the center of gravity' shifts to aI-position to one side of a point directly above such line of contact so that'f gravity alone will continue the rolling and dumping movement.

IVe claim:

l. Ina car damper, a substantially cylinsurface to dump a car contained within theY cage, and a counter-weight attached to said y cage.

2. In a car dump, a substantially cylindrical cage adapted to contain a car to be dumped, said cage being supported onra slanting surface and adapted to roll downward on said slanting lsurface to dump vthe car, the center of massof the'cage with an empty car therein lying substantially in the axis of said cylindrical cage.

3. In a car dump, a substantially cylindrical cage adapted to co-ntain a car to be dumped, said cage being supported on a slanting surface and adapted to roll downward onv said slanting surface to dump the car, the center of gravity of the cage with a loaded car therein lying above the line of contact between said cage and the supporting surface. Y y j 4. In a car dump, a substantially cylindrical. cage adapted to contain a car to be dumped, said cage being supported on` a slanting surface and adapted to roll downward on said slanting surface to dump the car, the center of gravity ofthe'cage with a loaded car therein lying above the'line of contact between said cage and the supporting surface, and the center of mass of the cage with an empty car lying substantiallysaid surface to dump the car, and adapted toY roll upward on said surface after the dumping operation to restore the empty car to its normal upright position, the relative positions of the center of mass ofthe cage with an empty car and the line of contact between the cage and the supporting surface remaining the same during the entire upward rolling of the cage with the empty car.

6. In a oar clump, a cage adapted to Contain a oar to bev dumped, said cage adapted to overturn to dump the oar, and turn back to restore the empty car to its normal upright position, the center of gravity of the cage with a loaded car being at all times above` the axis of rotation of the cage, and the relative positions of the center of grav'- ityY of the cage with an empty oar and the axis of rotation of the cage remaining the same at all times.

7. In a oar dump, a cage adapted to conmaining the same at all times.

In Witness whereof' We have hereunto snb- 2O scribed our names this 2O day of August,

GEORGE N. SIMPSON. ARTHURM. SIMPSON. 

